RPI direction + NS&I

Where is inflation going? Thoughts on this please. I know if we knew the answers to this kind of question, we'd be very rich, but ideas welcome.
Late next month I have a maturing NS&I inflation linked bond. It was
RPI +1%. I can renew for 3 or 5 years at RPI+0.05% tax free.
These were a great investment during the crash, but became terrible when inflation dipped towards zero.
I expect more inflation if labour win. ~3% for 5 years is available from some of the smaller banks, but taxable unless I use my ISA allowance. I already intend to make my max SIPP contribution from other funds.
As these RPI+ x funds are no longer available from NS&I for new investors, it may be worth keeping some.
I'm thinking maybe keep half for 3 years, and half into an ISA UK bond fund.
Tough choices. TIA.
fred
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On Tuesday, April 28, 2015 at 3:30:52 PM UTC+1, fred wrote:

One thing to think about is what happens if inflation becomes negative. The NSI bonds use 0 or RPI whichever is larger (IIRC).
The fact that you can no longer buy them, but only maintain the ones you have, suggests that they are a good thing.
Robert
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On Wed, 29 Apr 2015 08:10:44 -0700 (PDT), RobertL

Thanks. Pretty much my thoughts too - but ~3% fixed for 5 years is available. NS&I were quick to drop from RPI+1 down to RPI, but don't seem to want to increase now inflation is near zero.
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On Thursday, April 30, 2015 at 12:02:57 AM UTC+1, fred wrote:

I guess that tells us that the government expects inflation to rise significantly above 3% during the next 5 years.
Robert
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